CN116428027A - Steam turbine safety shut-off system - Google Patents

Steam turbine safety shut-off system Download PDF

Info

Publication number
CN116428027A
CN116428027A CN202310502284.3A CN202310502284A CN116428027A CN 116428027 A CN116428027 A CN 116428027A CN 202310502284 A CN202310502284 A CN 202310502284A CN 116428027 A CN116428027 A CN 116428027A
Authority
CN
China
Prior art keywords
transition pipe
sealing block
steam turbine
guide
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310502284.3A
Other languages
Chinese (zh)
Inventor
张晓慧
李俊忠
贺龙
郑文涛
张雁萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inner Mongolia Helin Power Generation Co ltd
Original Assignee
Inner Mongolia Helin Power Generation Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia Helin Power Generation Co ltd filed Critical Inner Mongolia Helin Power Generation Co ltd
Priority to CN202310502284.3A priority Critical patent/CN116428027A/en
Priority to LU504604A priority patent/LU504604B1/en
Publication of CN116428027A publication Critical patent/CN116428027A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/16—Trip gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

The invention relates to the technical field of steam turbines and discloses a safety shielding system of a steam turbine, which comprises a transmitter main body, wherein the transmitter main body comprises a transition pipe, a protection assembly for providing protection is arranged outside the transition pipe, a transverse plate is arranged on the protection assembly, a screw rod penetrating through the transition pipe is sleeved on the internal thread of the transverse plate, and a squeezing block is rotationally arranged at the bottom end of the screw rod; the guide assembly is arranged on the inner wall of the bottom of the transition pipe, a movable rod is arranged on the guide assembly, one end of the movable rod is fixedly connected with a first sealing block, one side, away from the first sealing block, of the movable rod is provided with a telescopic assembly, one end of the telescopic assembly is provided with a second sealing block, one side of the second sealing block is provided with a guide cover, the extrusion block stretches into the guide cover, and a pushing seat fixedly connected with the movable rod is arranged below the extrusion block. The invention can buffer the water hammer, reduce the harm caused by the water hammer when the pipeline is closed, and is beneficial to the safety of the pipeline.

Description

Steam turbine safety shut-off system
Technical Field
The invention belongs to the technical field of steam turbines, and particularly relates to a safety shielding system of a steam turbine.
Background
The steam turbine is a rotary power machine that converts energy of steam into mechanical work, and can be used as a prime mover for power generation, or can directly drive various pumps, fans, compressors, and the like. In the production process of using the steam turbine, a safety shielding system of the steam turbine is required to be used for protection, the system where the steam turbine is located is maintained, and meanwhile, shutdown loss caused by tripping of a unit is avoided.
The existing safety blocking system is directly connected with the fire-resistant oil system through a high-pressure fire-resistant oil pressure oil way, the fire-resistant oil system plays a role in oil supply, and once the high-pressure blocking system has the defects of jamming, damage, burning, orifice blocking and the like of an electromagnetic valve, the high-pressure oil can not be effectively blocked, and the safety operation of a unit is endangered, so that a pipeline is required to be cut off and sealed when the unit breaks down, the oil in the pipeline is suddenly sealed, a water hammer effect can occur, and the water hammer effect easily brings hidden danger to the safety of the pipeline, so that the safety blocking system of the steam turbine is provided.
Disclosure of Invention
The invention aims to provide a steam turbine safety shielding system, which aims to solve the technical problems of low safety coefficient and WeChat in the running process of the existing steam turbine safety shielding system.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
in some embodiments of the present application, a safety shielding system for a steam turbine is provided, including a transition pipe, a protection component for providing protection is provided outside the transition pipe, a cross plate is provided on the protection component, a screw rod penetrating through the transition pipe is sleeved on an internal thread of the cross plate, and a extrusion block is provided at the bottom end of the screw rod in a rotating manner;
the guide assembly is arranged on the inner wall of the bottom of the transition pipe, a movable rod is arranged on the guide assembly, one end of the movable rod is fixedly connected with a first sealing block, one side, away from the first sealing block, of the movable rod is provided with a telescopic assembly, one end of the telescopic assembly is provided with a second sealing block, one side of the second sealing block is provided with a guide cover, the extrusion block stretches into the guide cover, and a pushing seat fixedly connected with the movable rod is arranged below the extrusion block.
Preferably, the left side of the transition pipe is provided with a liquid inlet pipe, and the right side of the transition pipe is provided with a liquid outlet pipe.
Preferably, the protection component comprises two fixing frames fixedly sleeved outside the transition pipe, a plurality of reinforcing rods are arranged between the two fixing frames in an array mode, and the transverse plates are fixedly connected with the fixing frames.
Preferably, the guide assembly comprises a fixed block fixedly connected to the inner wall of the bottom of the transition pipe, a rectangular guide hole is formed in the fixed block, a guide rod is movably sleeved in the rectangular guide hole, and the guide rod is fixedly connected with the movable rod.
Preferably, the telescopic component comprises a sleeve fixedly connected to the second sealing block, a spring is sleeved in the sleeve, and an elastic band is connected between the second sealing block and the guide rod.
Preferably, the extrusion block and the pushing seat are provided with inclined planes on one sides close to each other, and rubber sleeves are arranged outside the first sealing block and the second sealing block.
Preferably, the threaded hole is formed in the transverse plate, the screw rod is matched with the threaded hole, the transition pipe is provided with the movable hole, the sealing ring is sleeved in the movable hole, a smooth round rod is arranged on one side of the screw rod below the transverse plate, and the smooth round rod penetrates through the sealing ring.
Compared with the prior art, the invention has the beneficial effects that when oil is normally sent, the oil enters the transition pipe from the liquid inlet pipe to push away the second sealing block, then enters the liquid outlet pipe to be discharged, when the oil needs to be closed, the first sealing block and the second sealing block are utilized to seal the two ends of the transition pipe, the water hammer generated by backflow can squeeze the guide cover, so that the second sealing block can be conveniently sealed leftwards, the water hammer in the liquid inlet pipe can squeeze the second sealing block again, and the spring can buffer at the moment, so that the acting force of the secondary water hammer is reduced.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic elevational view of a safety shut-off system for a steam turbine according to the present invention.
FIG. 2 is a schematic cross-sectional view of a safety shut-off system for a steam turbine according to the present invention.
FIG. 3 is a schematic perspective view of a safety shut-off system for a steam turbine according to the present invention.
Fig. 4 is a schematic perspective view of a movable rod and a first sealing block of a safety shut-off system for a steam turbine according to the present invention.
FIG. 5 is a schematic perspective view of a second seal block and pod of a turbine safety shut-off system according to the present invention.
In the figure: 1 liquid inlet pipe, 2 liquid outlet pipe, 3 transition pipe, 4 fixed frame, 5 reinforcing rod, 6 diaphragm, 7 screw rod, 8 extrusion piece, 9 fixed block, 10 guide bar, 11 movable rod, 12 first sealing head, 13 pushing seat, 14 sleeve pipe, 15 second sealing head, 16 spring, 17 kuppe, 18 elastic band.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The present invention will be described in further detail with reference to the accompanying drawings for a better understanding of the objects, structures and functions of the present invention.
Referring to fig. 1-5, according to some embodiments of the present application, a steam turbine safety shut-off system 1 includes a transition pipe 3, a protection component for providing protection is provided outside the transition pipe 3, a cross plate 6 is provided on the protection component, a screw rod 7 penetrating through the transition pipe 3 is sleeved on an internal thread of the cross plate 6, and a pressing block 8 is rotatably provided at a bottom end of the screw rod 7;
the guide component is arranged on the inner wall of the bottom of the transition pipe 3, a movable rod 11 is arranged on the guide component, one end of the movable rod 11 is fixedly connected with a first sealing block 12, one side, away from the first sealing block 12, of the movable rod 11 is provided with a telescopic component, one end of the telescopic component is provided with a second sealing block 15, one side of the second sealing block 15 is provided with a guide cover 17, an extrusion block 8 stretches into the guide cover 17, and a pushing seat 13 fixedly connected with the movable rod 11 is arranged below the extrusion block 8.
The beneficial effects of the technical scheme are as follows:
the outside of the transition pipe 3 is provided with a protection component for providing protection, the protection component is provided with a transverse plate 6, the internal thread of the transverse plate 6 is sleeved with a screw rod 7 penetrating through the transition pipe 3, the bottom end of the screw rod 7 is rotationally provided with an extrusion block 8, and the screw rod 7 can drive the extrusion block 8 to move downwards to extrude the pushing seat 13;
the guide component is arranged on the inner wall of the bottom of the transition pipe 3, the movable rod 11 is arranged on the guide component, one end of the movable rod 11 is fixedly connected with the first sealing block 12, one side of the movable rod 11, which is far away from the first sealing block 12, is provided with the telescopic component, one end of the telescopic component is provided with the second sealing block 15, one side of the second sealing block 15 is provided with the guide cover 17, the extrusion block 8 stretches into the guide cover 17, the pushing seat 13 fixedly connected with the movable rod 11 is arranged below the extrusion block 8, the guide component conveniently guides the first sealing block 12 and the second sealing block 15, and the telescopic component can buffer the second sealing block 15, so that the 'water hammer' acting force can be reduced.
In order to further optimize the above technical solution, as shown in fig. 1, a liquid inlet pipe 1 is disposed on the left side of the transition pipe 3, and a liquid outlet pipe 2 is disposed on the right side of the transition pipe 3.
The beneficial effects of the technical scheme are as follows:
the left side of transition pipe 3 is equipped with feed liquor pipe 1, and the right side of transition pipe 3 is equipped with drain pipe 2, and the oil flows away from feed liquor pipe 1 entering transition pipe 3, again from transition pipe 3 entering drain pipe 2.
In order to further optimize the technical scheme, as shown in fig. 3, the protection assembly comprises two fixing frames 4 fixedly sleeved outside the transition pipe 3, a plurality of reinforcing rods 5 are arranged between the two fixing frames 4 in an array manner, and the transverse plate 6 is fixedly connected with the fixing frames 4.
The beneficial effects of the technical scheme are as follows:
the protection component comprises two fixed frames 4 fixedly sleeved outside the transition pipe 3, a plurality of reinforcing rods 5 are arranged between the two fixed frames 4 in an array mode, a transverse plate 6 is fixedly connected with the fixed frames 4, and the fixed frames 4 and the reinforcing rods 5 provide protection for the outer portion of the transition pipe 3.
In order to further optimize the technical scheme, as shown in fig. 2, the guide assembly comprises a fixed block 9 fixedly connected to the inner wall of the bottom of the transition pipe 3, a rectangular guide hole is formed in the fixed block 9, a guide rod 10 is movably sleeved in the rectangular guide hole, and the guide rod 10 is fixedly connected with a movable rod 11.
The beneficial effects of the technical scheme are as follows:
the guide assembly comprises a fixed block 9 fixedly connected to the inner wall of the bottom of the transition pipe 3, a rectangular guide hole is formed in the fixed block 9, a guide rod 10 is movably sleeved in the rectangular guide hole, the guide rod 10 is fixedly connected with a movable rod 11, the guide rod 10 moves in the rectangular guide hole, the movable rod 11 can be guided, and then the first sealing block 12 and the second sealing block 15 are guided.
In order to further optimize the technical solution, as shown in fig. 2, the telescopic assembly includes a sleeve 14 fixedly connected to a second sealing block 15, a spring 16 is sleeved inside the sleeve 14, and an elastic band 18 is connected between the second sealing block 15 and the guide rod 10.
The beneficial effects of the technical scheme are as follows:
in normal transfusion, the elastic band 18 tightens the first sealing block 12, and the telescopic component tightens the second sealing block 15, so that the liquid inlet pipe 1, the transition pipe 3 and the liquid outlet pipe 2 are communicated.
In order to further optimize the above technical solution, as shown in fig. 2, the sides of the pressing block 8 and the pushing seat 13, which are close to each other, are provided with inclined planes, and the outer parts of the first sealing block 12 and the second sealing block 15 are provided with rubber sleeves.
The beneficial effects of the technical scheme are as follows: the extrusion piece 8 and the side that promotes seat 13 are close to each other all are equipped with the inclined plane, and the outside of first sealing block 12 and second sealing block 15 all is equipped with the rubber sleeve, and the rubber sleeve is favorable to the leakproofness.
In order to further optimize the technical scheme, as shown in fig. 2, a threaded hole is formed in the transverse plate 6, a screw rod 7 is matched with the threaded hole, a movable hole is formed in the transition pipe 3, a sealing ring is sleeved in the movable hole, a smooth round rod is arranged on one side of the screw rod 7 below the transverse plate 6, and the smooth round rod penetrates through the sealing ring.
The beneficial effects of the technical scheme are as follows: the threaded hole is formed in the transverse plate 6, the screw rod 7 is matched with the threaded hole, the transition pipe 3 is provided with a movable hole, a sealing ring is sleeved in the movable hole, a smooth round rod is arranged on one side of the screw rod 7 below the transverse plate 6, and the smooth round rod penetrates through the sealing ring.
The whole working principle of the invention is as follows:
when normal transfusion is carried out, the elastic band 18 tightens the first sealing block 12, and the telescopic component tightens the second sealing block 15, so that the liquid inlet pipe 1, the transition pipe 3 and the liquid outlet pipe 2 are communicated, when the liquid inlet pipe needs to be closed, the screw rod 7 is manually rotated to move downwards, the screw rod 7 drives the extrusion block 8 to move downwards to extrude the pushing seat 13, the pushing seat 13 drives the movable rod 11 and the first sealing block 12 to move rightwards to seal the liquid outlet pipe 2, when the movable rod 11 moves rightwards, the spring 16 drives the second sealing block 15 to also move rightwards, and the 'water hammer' backflow generated when the first sealing block 12 is closed can move leftwards into the extrusion guide cover 17, so that the second sealing block 15 is pushed to buffer the first 'water hammer', and the 'water hammer' in the liquid inlet pipe 1 is extruded to push the second sealing block 15 to move rightwards to compress the spring 16, so that the spring 16 is utilized to buffer the second 'water hammer' again, thereby effectively relieving acting force brought by the 'water hammer' and being beneficial to the safety of a pipeline.
In order to further optimize the technical scheme, the invention further comprises a data acquisition module, a data processing module and a control module; the data acquisition module is used for acquiring parameter data in the operation process of the steam turbine; the data processing module is connected with the data acquisition module and is used for generating a working state instruction of a steam inlet valve of the steam turbine according to the parameter data; the control module is connected with the data processing module and the steam turbine, and is used for adjusting the rotating speed of the steam turbine and the bearing oil pressure of the steam turbine according to the working state instruction.
The data processing module is used for setting a preset value A0 of the rotating speed value of the turbine, and is also used for setting a first preset rotating speed value difference a1, a second preset rotating speed value difference a2, a third preset rotating speed value difference a3 and a fourth preset rotating speed value difference a4, wherein a1 is more than a2 and less than a3 and less than a4; the data processing module is also used for setting a first preset working condition matrix G1 (G1, h 1), a second preset working condition matrix G2 (G2, h 2), a third preset working condition matrix G3 (G3, h 3) and a fourth preset working condition matrix G4 (G4, h 4), wherein G1-G4 are sequentially from a first preset rotating speed to a fourth preset rotating speed, G1 is more than 2 and less than G3 and less than G4, and h 1-h 4 are sequentially from a first preset bearing oil pressure to a fourth preset bearing oil pressure, h1 is more than h2 and less than h3 and less than h4;
selecting a preset working condition matrix G as the working condition of the steam turbine according to the acquired difference value between the rotational speed value delta A of the steam turbine and the preset value A0 of the rotational speed value of the set steam turbine;
when delta A-A0 is less than or equal to A1, selecting the first preset working condition matrix A1 as the working condition of the steam turbine;
when a1 < [ delta ] A-A0 is less than or equal to A2, selecting the second preset working condition matrix A2 as the working condition of the steam turbine;
when a2 < [ delta ] A-A0 is less than or equal to A3, selecting the third preset working condition matrix A3 as the working condition of the steam turbine;
when a3 < [ delta ] A-A0 is less than or equal to A4, selecting the fourth preset working condition matrix A4 as the working condition of the steam turbine;
when the ith preset operating condition matrix G i is selected as an operating condition of the steam turbine, the control module controls the steam turbine to operate at the ith preset rotational speed gi, and the control module also controls the bearing oil pressure of the steam turbine to operate at the ith preset bearing oil pressure h i, i=1, 2,3,4.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.

Claims (7)

1. The safety shielding system for the steam turbine is characterized by comprising a transition pipe (3), wherein a protection assembly for providing protection is arranged outside the transition pipe (3), a transverse plate (6) is arranged on the protection assembly, a screw rod (7) penetrating through the transition pipe (3) is sleeved on the inner thread of the transverse plate (6), and an extrusion block (8) is arranged at the bottom end of the screw rod (7) in a rotating mode;
the guide assembly is arranged on the inner wall of the bottom of the transition pipe (3), a movable rod (11) is arranged on the guide assembly, one end of the movable rod (11) is fixedly connected with a first sealing block (12), one side, away from the first sealing block (12), of the movable rod (11) is provided with a telescopic assembly, one end of the telescopic assembly is provided with a second sealing block (15), one side of the second sealing block (15) is provided with a guide cover (17), the extrusion block (8) stretches into the guide cover (17), and a pushing seat (13) fixedly connected with the movable rod (11) is arranged below the extrusion block (8).
2. The steam turbine safety shut-off system according to claim 1, wherein the left side of the transition pipe (3) is provided with a liquid inlet pipe (1), and the right side of the transition pipe (3) is provided with a liquid outlet pipe (2).
3. The steam turbine safety shut-off system according to claim 1, wherein the protection assembly comprises two fixing frames (4) fixedly sleeved outside the transition pipe (3), a plurality of reinforcing rods (5) are arranged between the two fixing frames (4) in an array, and the transverse plates (6) are fixedly connected with the fixing frames (4).
4. The steam turbine safety shut-off system according to claim 1, wherein the guide assembly comprises a fixed block (9) fixedly connected to the inner wall of the bottom of the transition pipe (3), a rectangular guide hole is formed in the fixed block (9), a guide rod (10) is movably sleeved in the rectangular guide hole, and the guide rod (10) is fixedly connected with the movable rod (11).
5. The steam turbine safety shut-off system according to claim 4, wherein the telescopic assembly comprises a sleeve (14) fixedly connected to a second sealing block (15), a spring (16) is sleeved inside the sleeve (14), and an elastic band (18) is connected between the second sealing block (15) and the guide rod (10).
6. The steam turbine safety shut-off system according to claim 1, wherein the sides of the extrusion block (8) and the pushing seat (13) which are close to each other are respectively provided with an inclined surface, and the outer parts of the first sealing block (12) and the second sealing block (15) are respectively provided with a rubber sleeve.
7. The steam turbine safety shut-off system according to claim 1, wherein the transverse plate (6) is provided with a threaded hole, the screw rod (7) is matched with the threaded hole, the transition pipe (3) is provided with a movable hole, the inside of the movable hole is sleeved with a sealing ring, one side of the screw rod (7) below the transverse plate (6) is provided with a smooth round rod, and the smooth round rod penetrates through the sealing ring.
CN202310502284.3A 2023-05-04 2023-05-04 Steam turbine safety shut-off system Withdrawn CN116428027A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202310502284.3A CN116428027A (en) 2023-05-04 2023-05-04 Steam turbine safety shut-off system
LU504604A LU504604B1 (en) 2023-05-04 2023-06-28 The safety trip system for steam turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310502284.3A CN116428027A (en) 2023-05-04 2023-05-04 Steam turbine safety shut-off system

Publications (1)

Publication Number Publication Date
CN116428027A true CN116428027A (en) 2023-07-14

Family

ID=87081519

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310502284.3A Withdrawn CN116428027A (en) 2023-05-04 2023-05-04 Steam turbine safety shut-off system

Country Status (2)

Country Link
CN (1) CN116428027A (en)
LU (1) LU504604B1 (en)

Also Published As

Publication number Publication date
LU504604B1 (en) 2024-01-09

Similar Documents

Publication Publication Date Title
CN115387433A (en) Intelligent no negative pressure secondary water supply equipment
CN116428027A (en) Steam turbine safety shut-off system
CN210686244U (en) Multi-core diaphragm pump
CN104578534A (en) Submersible motor exhausting and water supplementing system applied to deep well
CN213954516U (en) Diaphragm type hydraulic control valve for preventing water hammer
CN212177976U (en) Pipeline pressure relief structure
CN210461917U (en) Double-sealing piston type flow-regulating pressure-regulating valve
CN111022333B (en) Injection water pump
CN216344166U (en) Stacked pressure reducing valve with two-stage pressure reducing structure
CN219896898U (en) High-flow voltage stabilizing device
CN212031427U (en) Steam supply device for humidity test
CN211449660U (en) Wisdom water pressure equipment
CN213574880U (en) Cabinet type electro-hydraulic actuating mechanism
CN214404847U (en) Self-operated regulating valve with protection effect
CN220185932U (en) Novel slow-closing check valve
CN220551246U (en) Rotor pump with pressure release protect function
CN213419435U (en) Vortex type air pump with high-pressure regulation protection
CN220581260U (en) Water pump with pressure regulating function
CN216975364U (en) Compact filter press hydraulic station
CN215805482U (en) Hydraulic speed regulating valve with safety device
CN221693966U (en) Oil conveying system of pushing centrifugal machine
CN208310985U (en) A kind of energy-saving control device for air compressor
CN214247838U (en) Hydraulic valve for hydraulic press
CN117967845B (en) Tank safety valve
CN210949050U (en) Energy-saving air compressor machine admission valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20230714